266 AMPnrroDA normalta. 



fringed -wath cilia ; propodos not longer than the carpus, and 

 nearly of the same ovate form ; palm convex, not defined, fringed 

 with a few cilia. Second pair of gnathopoda large, having the 

 carpus broad, vciy largely produced supcro -posteriorly, and also 

 produced infcro-anteriorly to a long, sharp, single-pointed pro- 

 cess ; jn-opodos scarcely more than half the width of the carpus, 

 margins subparallel, the lower being slightly waved ; dactylos 

 having the inner margin smooth. The rest of the animal does not 

 differ materially from G. ahditiis. 



Female. — Resembles the male in everything except in the form of 

 the second pair of gnathopoda : the carpus is not supero-postcriorly 

 produced, and the infero-anterior process is developed in the form 

 of a plate that coiTCsponds with the inferior surface of the pro- 

 podos ; propodos ovate, palm but slightly defined ; dactylos less 

 powerful than in the male. 



Length of male -^ths, of female -^ths of an inch. 



Hah. Banff (Mr. Edward); Northumberland {Rev. A.M.Norman); 

 coasts of Bretagne {Milne- Edwards). 



I have only seen dead specimens ; they were spotted much like 

 C. ahditiis. Among those kindly lent to me by the Rev. A. M. Nor- 

 man is one that has the gnathopodos on the left side of the second 

 pair malformed — the malformation assuming the character adapted 

 to the female. 



6. Cerapus macrodactylus. (Plate XLV. fig. 6.) 

 Pyctilus macrodactylus, Dana, U. S. Explor. Exped. p. 974. pi. 67. f. 3. 



" Body rather slender. Coxae of moderate size. Cephalon oblong ; 

 the front margin of either side with a projection containing the 

 eye. Antennte elongate : inferior pair shorter than the body ; third 

 and fourth joints long, subequal ; flagellimi a Kttle shorter than 

 the base, having about ton articuli, setae very short. Pirst pair of 

 gnathopoda small ; the propodos and cai'pus together narrow ellip- 

 tical in outline, short hirsute ; dactylos small. Second pair of gna- 

 thopoda very stout ; carpus and propodos* together •< -shaped, the 

 immoveable process being very much elongate, simple, and pointed, 

 and the upper portion projecting very far beyond its base ; dactylos 



* very long, as long as the propodos, and sparsely short-hirsute. 

 First and second pairs of pereiopoda subequal ; third pair with 

 the first joint having a narrow acute prolongation behind. 



" Hah. East Indies, in the Sooloo Sea." — Dana. 



* " Hand," Auct. 



